Construction block



FIG. 1 is a perspective view of the construction block;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevation view thereof; and,

FIG. 5 is a right side elevation view thereof.

The broken lines shown in FIG. 1 are for illustrative purposes only andform no part of the claimed design.

The ornamental design for a construction block, as shown and described.